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http://www.head-fi.org/forum/thread/562428/review-kozee-infinity-x1-custom-molded-iem
See above for my in depth review. This really is a good product. The issue is with the company itself. As I mention in the review, they are not returning emails from customers. And when people do manage to track them down on the phone - they make promises that are apparently not kept. I like Kozee...” --project86

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[I do not have trained ears, nor do I have a great setup. Hopefully I use the right words to describe the sound]
Even with the sibilance I love listening to them more than my SoundMagic E10 and my Alessandro MS2 (Grado 325is). The E10s are pretty good, but they somehow lack the fullness that makes listening satisfying. The XBF400Pro delivers just that. They produce rich and...” --drakool